I couldn’t find an insulated dog door for my sliding porch that could survive a -40°C winter, so I designed my own! This 100% 3D-printed solution uses a simple dovetail design for tool-free assembly. After 45 days of testing in extreme cold, I’ve had zero frost or condensation! It takes 2 mins to install and 30 seconds to remove. If you have extreme winds, I’ve added slots for optional 25x15x5mm magnets. Stay warm!